package apihomework1;

public class StringDemo {
    public static void main(String[] args) {
        String s1 = "123abc";
        String s2 = "123abc";
        String s3 = "123abc";
        String s4 =new String("123abc");
        System.out.println(s1==s2);
        System.out.println(s1==s3);
        System.out.println(s1==s4);

        String s = "123";
        String s5 = s+"abc";
        System.out.println(s1==s5);
        String s6 = "123"+"abc";
        System.out.println(s1==s6);


        String s7 = "123abc";
        String s8 = new String("123abc");
        System.out.println(s7==s8);
        System.out.println(s7.equals(s8));


    }

}
